Difficulties with XviD files

[Quietseb]

I didn't tell at first, but I must say that I don't quite like codec packs... (and it seems many people have trouble with Nimo's ...)

about the greenish thing:
this problem seems to be specific to xvid
It's been talked about several times in this forum but I don't quite remember whether there was a "works anytime" solution proposed.
However I would suggest you updated the Xvid Codec.
for instance you can download Koepi's build

As an alternative you can use ffdshow which is a "universal" decoder for videos.
Some time ago I would have recommended using the last stable version but it's turning old (june 2002); latest alpha versions are trustworthy and have solved some problems I had with xvid files [and they propose some interesting new features over the old build]
ffdshow is definitely my preferred solution as a decoder

if I disable overlay and force rgb bsplayer does not recognise file format

I don't have an explanation but I know this happens from time to time

(worthy of an entry in the F.A.Q. I would say...)

I'd say too ;)