The all famous mod_rewrite issue

[eluser]selman555[/eluser]
[quote author="Jeroen Schaftenaar" date="1342550403"]Mod_rewrite is a web server issue, try looking at those...[/quote]
Not sure what I should look at.
When I started my project the first time, I got it working on xampp and on the domain.
Now I don't remember what settings I have to change in order for mod_rewrite to work with xampp.