I've got that exact model (or the UK version of it anyway), it plays Xvid fine. You'll have to use MpegModifier on the files if they've got Packed Bitstream and it doesn't do GMC but otherwise it'll play pretty much anything you grab in Mpeg4 .avi format.
How do I find if the file has Packed bitstream? Would MediaInfo tell me?
Edit this is what it tells me about the file where should I look or what program would tell me that information?
CODEGeneral
Complete nameÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: C:\-BLANK-.avi
FormatÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : AVI
Format/InfoÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: Audio Video Interleave
File sizeÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: 701 MiB
DurationÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 1h 22mn
Overal bit rateÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: 1188 Kbps
Writing applicationÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: AVI-Mux GUI 1.17.7, AugÂÂ8 2006ÂÂ20:59:17
Video
FormatÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : MPEG-4 Visual
Format profileÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : Streaming Video@L1
Format settings, BVOPÂÂÂÂÂÂÂÂÂÂÂÂ: Yes
Format settings, QPelÂÂÂÂÂÂÂÂÂÂÂÂ: No
Format settings, GMCÂÂÂÂÂÂÂÂÂÂÂÂ : No warpoints
Format settings, MatrixÂÂÂÂÂÂÂÂÂÂ: Default
Codec IDÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : XVID
Codec ID/HintÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: XviD
DurationÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 1h 22mn
Bit rateÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 1064 Kbps
WidthÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: 640 pixels
HeightÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 272 pixels
Display aspect ratioÂÂÂÂÂÂÂÂÂÂÂÂ : 2.35
Frame rateÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 23.976 fps
ResolutionÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 8 bits
ColorimetryÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: 4:2:0
Scan typeÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: Progressive
Bits/(Pixel*Frame)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 0.255
Stream sizeÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: 628 MiB
Writing libraryÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: XviD 1.2.0SMP (UTC 2006-01-08)
Audio
FormatÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : MPEG Audio
Format versionÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : Version 1
Format profileÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : Layer 3
Codec IDÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 55
Codec ID/HintÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: MP3
Bit rate modeÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: Variable
Bit rateÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 115 Kbps
Nominal bit rateÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 128 Kbps
Channel(s)ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 2 channels
Sampling rateÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: 48.0 KHz
ResolutionÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ : 16 bits
Stream sizeÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: 68.2 MiB
TitleÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: -BLANK-
Writing libraryÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: LAME3.92
Encoding settingsÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ: ABR