Johan,
I am pleased my instructions helped. Now,
IF if you want to go one step further you can 'root' your phone and get 'Superuser' access by following the steps in this link:
Root / Unroot Samsung Galaxy 3 Running Android 2.2 FroYo | TechAppz32
z4root worked for me on my I5800 with Android 2.1, but I couldn't get it to work with the 2.2 version I5800XXJPB version . However, I downloaded Superoneclick and followed the instructions in the link and it worked straight away.
To install busybox, I downloaded it to my PC, unzipped it to get the .apk file, then transferred it to the root directory of my microSD card using a microSD adapter in a card reader. Then put the microSD card back in the phone, go to 'Applications', and look for the 'My Files' icon (it is on 'screen 2' on my phone). Click on it and it will show you what is installed on your microSD card. Scroll down and click on busybox.apk and follow the instructions to install it.
have fun!
Bruce