If your file is smaller than the 4.3g limit of a DVD5 disk then yes just use DVD Decrypter in iso write mode and it will burn your disk. However, if the file is larger then you will need to compress it to fit and you will need DVD Shrink. You can get both programs here along with guides on how to use them.
Id say your best downloading AVI files as most torrent sites have comments saying what the quality is like, then create your own menu.
Just my opinion but I'd rather download 3 900mb AVI files anyday over 1 2.7gb ISO image, usually you'll get the same quality anyway, as an AVI file is basically just a compressed ISO DVD image.
The ISO is only 544MB. I tried DVD Decrpyter, but got the following errors:
I 13:51:41 DVD Decrypter Version 3.5.4.0 started!
I 13:51:41 Microsoft Windows XP Home Edition (5.1, Build 2600 : Service Pack 2)
I 13:51:41 Initialising SPTI...
I 13:51:41 Searching for SCSI / ATAPI devices...
I 13:51:42 Found 1 CD-RW, 1 DVD-ROM and 1 DVD±RW!
I 13:52:50 Operation Started!
I 13:52:50 Source File: C:\MP3\beatles ready steady go\Beatles - Ready Steady Go Original VCD\Beatles - Ready Steady Go Original VCD.iso
I 13:52:50 Source File Sectors: 245,878 (MODE1/2048)
I 13:52:50 Source File Size: 503,558,144 bytes
I 13:52:50 Source File Application Identifier: UltraISO V7.2 CD & DVD Image Creator, Copyright (c)2002-2004 EZB Systems, Inc.
I 13:52:50 Destination Device: [0:0:0] SONY DVD RW DRU-500A 2.0e (F:) (ATA)
I 13:52:50 Destination Media Type: DVD-R (Disc ID: CMC MAG. AM3) (Speeds: 1x, 2x, 4x)
I 13:52:50 Write Mode: DVD
I 13:52:50 Write Type: SAO
I 13:52:50 Write Speed: MAX
I 13:52:51 Link Size: Auto
I 13:52:51 Test Mode: No
I 13:52:51 BURN-Proof: Enabled
I 13:52:51 Filling Buffer...
I 13:52:52 Writing LeadIn...
W 13:52:52 Failed to Write Sectors 0 - 31 - Invalid Address For Write
W 13:52:52 Retrying (1 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (2 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (3 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (4 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (5 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (6 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (7 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (8 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (9 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (10 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (11 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (12 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (13 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (14 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (15 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (16 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (17 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (18 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (19 of 20)...
W 13:52:52 Retry Failed - Invalid Address For Write
W 13:52:52 Retrying (20 of 20)...
W 13:52:52 Retry Failed! - Invalid Address For Write
W 13:53:21 Failed to Write Sectors 0 - 31 - Invalid Address For Write
W 13:53:21 Retrying (1 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (2 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (3 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (4 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (5 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (6 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (7 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (8 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (9 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (10 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (11 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (12 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (13 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (14 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (15 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (16 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (17 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (18 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (19 of 20)...
W 13:53:21 Retry Failed - Invalid Address For Write
W 13:53:21 Retrying (20 of 20)...
W 13:53:21 Retry Failed! - Invalid Address For Write
E 13:53:22 Failed to Write Sectors 0 - 31 - Invalid Address For Write
I 13:53:22 Synchronising Cache...
E 13:53:23 Failed to Write Image!
E 13:53:23 Operation Failed! - Duration: 00:00:32
I 13:53:23 Average Write Rate: N/A - Maximum Write Rate: N/A