Paul
you can update your unit to V4.01 using an USB Card reader and a Compact flash card. The Update is infact available both as via card (Pc/Mac) and serial port application (Pc/Mac running Windows). It's actually a much easier and faster method (CFcard).
Best way to run multiple FX processors is always a mixer, where dry signal and wet from 2 (or more fx units) are summed in parallel. This is great with time domain fx like chorus/flanger/delay/pitch shifter/reverb. typical series effects include compressor/wah/eq/tremolo/filter fx….. which require the fx processor to be in series routing.
Check our technotes in the Knowledge Base on EventideDOTcom for more ideas….
all the best
I
