Hi,
No, the whole idea is to NOT turn the interrupt on, in other words don't enable it. If you enable it (and the GIE bit is set) it WILL cause interrupt - which you don't want.
It doesn't matter if the interrupt is enabled or disabled, the interrups request flag will get set no matter what. It's just that it won't cause an actual interrupt when it's not enabled. Depending on which PIC it is you may want to set if you want the flag to be set on the rising or falling edge, which PIC is it?

And you're right, it'll work as a nice latch.

/Henrik.