OK, I've used WinRar on my laptop to rip apart the .ipk file.
I then ripped apart the control.tar.gz file and amended the file.
Can anyone tell me how to combine the control directory that the control file is in back into a control.tar.gz
And how to combine the three resultant files control.tar.gz, data.tar.gz and debian-binary back into an .ipk file
Thanks!!