OpenOffice has built-in export capability to PDF.
From File menu, choose Export as PDF. Then, name the file, click Save, and choose the 'Lossless' rather than JPEG compression. -- My documents have test & photos, so can't guarantee that it works perfectly for drawings. Expect that it will for vector-type.
I installed CutiePDF & the necessary Ghostscript converter OK, but it stops operation with an 'Out of Memory Error.'
I have 512 MB Ram, am only running Win, McAfee Anti-Virus, ZoneAlarm firewall & IE 6. Normal? Anyone else?