Davidoli i bought an interface off ebay almost two year ago and couldn't get it to work and just assumed that i had just wasted 40pounds or whatever it was. Until last week when i came across a forum discussing exactly the problem i was having and gave instructions(attached) on how to install carsoft and the crack properly.
So then i tried and hey presto it worked.

The interface came with all required cables(OBDI,OBDII, Serial extension) and i have a 2 or 3 year old IBM laptop(1.6ghz 128mb ram) running XP i used it on.
Im certainly no expert but thats how i got it working, hope this helps.
Alan