this new player looks pretty cool, check it out below. Don't know if it works on 6600, had to post pretty quickly. Its 25 euros. I tanslated it into english for you. I reckon that on the ngage its better than mobiclip and pvplayer because the quality is pretty good, the file sizes are quite small.

http://babelfish.altavista.com/babelfish/tr?url=http%3A%2F%2Fwww.smartsam.de%2Fproduct.php% 3Fprod_id%3D15221%26SID%3D926a2388c7b7972700d9c3ac 552819fc&lp=deen&intl=1&tlb=1

Actually heres a working link, but its in german. Also, i looked again and it says it plays rubbish on the 6600

What about the original link,this one does not work.

sorry- http://www.smartsam.de/product.php?prod_id=15221&SID=926a2388c7b7972700d9c3ac552819fc

Its in the shop.SmartMovie S60 (http://www.handango.com/brainstore/PlatformProductDetail.jsp?siteId=308&jid=9AAE6253FDAFAB1DD4CCD371B92ABDBC&platformId=4&productType=2&productId=110546&sectionId=0&catalog=20)