Please forgive me if I'm in the wrong place to ask this. I have tried to search the forums and the manual, but not being a computer geek, I'm in over my head.
My XP guest has a 40GB virtual drive, but I need to make it bigger (5 GB is left). Is there a reasonably easy way to do this without major risks or going to computer science classes?

Everything I found on the forums seems old (pre version 4 of VB). I see there's some kind of utility that is supposed to do this, but the site (
https://github.com/przemoc/vidma) says it's only alpha and not necessarily safe. This site (
http://trivialproof.blogspot.com/2011/0 ... 9862927608) is post v. 4, but it says to use the vboxmanage command line system (have installed on your system), and I don't know what that is or how to use it (Start > Run ??).
If someone would be kind enough to walk me through this, I'd really appreciate it. Thank you.
Specs: MacBook Pro Penryn (4,1; early 2008; Model Number A1260), 2.4GHz, Core 2 Duo, 4 GB RAM (1.5 of this goes to Windows VM), running Snow Leopard (10.6.

[that's 10 dot 6 dot 8, but smilies keep changing the final digit]; Virtualbox v. 4.1; Windows Win XP SP3 guest is allocated 1.5 GB RAM of the total 4GB RAM on the Mac machine and has a 40GB "Normal" (VMDK) virtual drive.
edit: clarify Mac OS X version due to smilies interfering