I edited the Israel Orange branded custompack myself and removed all the orange branding like the custom themes, start-up animations, sounds, java apps/games as well as all the preset Orange mms, wep, internet, email, dcom, license settings and templates.

I also changed a few setting values to the match up with the Telstra custompack so to ensure its good for use in Australia.

The end result gives you a nice un-branded generic custompack.
Download here: W760i_1215-5138_R7A_DEBRANDED_GENERIC_Israel

If that doesnt work, for what ever reason try this:
The only difference between the two is that the unnecessary files (gifs.mp3s.java) haven't been deleted in this one but the references to them within the xml files have still been removed so it should still give you and unbranded phone.
Download here: W760i_1215-5138_R7A_IL_Orange_DEBRANDED_Israel