I too use Protel 99SE. I find that it works well, the autorouter makes a fair attempt at most things and does a damn good job IF you take the time to set up design rules.
Anyone else out there using Protel? have you found a method of specifing impedance for a given net? has anyone got it working under LINUX with a 'doze emulator?
I apreacate that this is NOT '51 related but you guys seam to be doing real design work (as apposed to moth the electronics forums where they take the 'logo brick' approach!)

Andy