Question : Problem: iPod and iTunes sync question

If i have more songs on my ipod than in itunes on my computer, because of disk space problems, will it make problems when i'll try to sync or is it ok?

Answer : Problem: iPod and iTunes sync question

When you sync your IPod ITunes asumes that you made the changes on the computer and will make a "copy" of the library from the computer to the IPod erasing the files on the IPod that don`t match with those on the playlist from the computer.
As Xamayon says you'll need to mage your IPod manually, I never done it but you need to change the settings on ITunes as it normally is installed with the Auto Sync option on, so you need to set it to off.
Once that's done you just drag the "files" from ITunes to your IPod.
Detailed instructions are on ITunes Help