Well... so I think, that it's the better decision to buy the Kiss player... Last question: Are there many films on the net, which have qpel enabled or it's a not so often used thingy?
first of all, Quarter Pixel flags (QPEL) can be used in both XviD and DivX encoded movies. If you use encoding profiles with DivX codec, and you select Home Theater profile, you will have QPEL disabled by default... This is done to ensure compatibility with stand-alone players... However, there is a wide range of movies that you download from the internet (with any sharing program or bit torrents) that will have QPEL flags, since QPEL offers better quality for PC Monitor viewing...
My experience tells me that most movies you get from these sharing programs are QPEL enabled... However, you can always check if you have QPEL or not:
Sigma Designs released a small utility to check qpel and gmc... but you can get it only if you have a REALmagic Xcard... However, i managed to get my hands on this file from SD... you can get it here: http://fer.peque.org/descargas/avicheck.zip
Load the avi file and look for S(GMC)-VOP and QuarterPixel usage... as simple as that...
if your avi files contain QPEL flags, you will get something like this: