yeah go to www.3vix.com dl divix doctor it is a good prog but divx valadator I find is better it should come with divix doctor or at least it use to. then open with quicktime go to www.divx.com dl divx 5.02 that will help also go into the contorl panel click on quicktime setting and update quicktime taht will help too.
for .rm or .ram use real player if you have osx get realone
for .asf use win meda player
also go into youer controle pannel and click on quicktime settings then go to update update qucktime taht should help too.
peace
munchables