maxeuer, first up, it is PACKAGE and PACKAGES and NOT paket or pakets. If I get you correctly, what you should really be looking at are backports i.e. newer packages available on e.g. sarge backported and built against Woody for use on Woody. The url is here:
Try not to attempt to tamper with xserver and related sources, they are massive monsters with thousand upon thousand of lines of code. Should build fail, debugging would be present quite an intimidating task irrespective of what you may have to assist you e.g. linda and lintian. Use the backports or dist-upgrade to Sarge if you want newer stuff.