I don't own one of these remotes, but I am interested in seeing if keymoves work. According to the manual, a large number of 9XX commands (975, 980, 990, 991, 992, 993, 995 ) are implemented, so it seems likely that 994 is also supported.

One thing I notice is that for 9XX commands that are specific to a device, the sequence is a little different than you would have seen with 8810s.

Here's one possible sequence: Since I don't know what components you're trying to control, I'll assume that you've already setup Audio 1658 on the Audio device, just as an example.
1) Press Setup until 2 blinks
2) Tap Audio <---- this is the unusual step
3) Enter 994 (does it blink twice?)
4) Tap Setup
5) Enter 45518 (could be just about any 5 digit starting with 6 or less)
6) Tap the Blue button (or just about any other button.)

Does the remote blink twice?

Most UEI remotes don't use step 2) and will assign the advanced code to the current device mode. I'm guessing that step 2) is needed for the OARI06G. However, it the remote doesn't blink twice following step 3), try omitting 2) and check if the remote blinks twice after entering 994.