Hi Guys,
came up with better solution.

Once you get hang of it, only takes a few minutes.
1.Choose style. Press Copy. Choose USB Stick. Press Save.
2.Record chord progression in sequencer & save to usb stick.
3.In PC use Rename function to change .sty or .prs etc etxension to .mid ( ie beguine.prs to beguine.mid) This turns it into midifile.


Depending on how your pc sequencer functions you basically have to merge these 2 files ( beguine .mid & chord progression .mid) into a single midi file.
I use the old XG Works program, since it doesn't have a merge function, this is the way I do it.

Load chord progression sequence in sequencer, DELETE TRACK 1. Select all the tracks & use Copy function.

Next load in Bequine midifile, don't do any saves etc , the chord progression will be overwritten by the midifile tracks, but don't worry.

Next delete all the tracks except for track 1 . midi channel 1.

Use the Paste Function & your chord progression track will reapear.

Next bring up your Markers track ( Master Track in XG Works)

Delete any Markers & Data below Marker 1 ( Main A : fn main A ) in psr1500 styles)

Press "SAVE" not save as.

Hilight Beguine .mid & press UNDO function ( found under ORGANIZE in Win7)
It turns back into beguine.prs

Load Style in yammie.
Goto PARAMETER
Change Bass Ntt to Bypass
Do same for rest of instruments ( except drums) Save

Choose the original style.

Press Digital Record.
Style Creator
BASIC. Choose main a
Change Pattern Length to suit Chord Progression Variation. Press Execute.
TAB to Assembly.
Choose Section
Double Click Rythm 1
Choose Style to copy from ( USB :Beguine:Main A Rythm 1
Do Same for all the rest of the instruments.
Save.

Good Luck