Adjust midi lag for single midi port only

Question

Hello all. I am running L8 on a G5 and Cubase 4 on a laptop. I have a MOTU MTPAV on the G5 and an Edirol UA25 usb midi/audio device on the laptop. I connected the laptop to output port 8 on the MTPAV and can now access a load of VSTs I have on it from Logic, by creating a multi instrument and assigning it to midi out port 8.
The problem I have is with the midi, there is a slight delay hearing the sounds when the keys are pressed. I thought it might be audio latency but I played about with Logic Preferences, Midi and Sync there is a setting, All Midi Out, you can set a positive or negative setting for delay. When I set it to +90 milliseconds the lag/delay totally disappears and is in perfect time with the metronome coming from Logic.
The problem is that other midi devices are affected so any of my external midi gear which plays in time with Logic's timing properly, now plays too early. Is there any way of sending the midi compensation to a specific port instead of all the ports ??
Cheers

Answer 1

I received this Christmas a Casio WK-110 and couldn't make it work on my MacBook Pro, with or without the Yamaha driver.
However, I decided to write my own driver, and publish it on Google Code. It turns out it was a lot easier than I thought - the sample code provided by the CoreAudio SDK worked almost instantly with my keyboard.
Here is the project page : http://code.google.com/p/casiousbmididriver
Download the binary driver, extract it, open the disk image and copy the CasioUSBMIDIDriver.plugin file into your Library/Audio/MIDI Drivers folder. Your keyboard should now work.
This driver should work for USB devices identified by 0x07CF/0x6802. It might me possible that some keyboards aren't identified by this ID, but it shouldn't be hard to create a second driver for these.