HT and RUb1.45 aren't configured to work together, so you may well get crashes. You will definitely get a crash if you try to load a new mod while in mid-patrol - that's 100% guaranteed with both RUb and HT.
However, if you load RUb correctly it will not cause a crash. The biggest problems that people run into with mods are:
1. They often don't read the mod's readme file and thus miss important configuration instructions.
2. They often tend to use methods of installation that are downright careless (i.e. installing in mid-patrol).
3. They tend to go on the assumption that every mod will probably work with every other mod.
Crashes are almost always (999 times out of 1000) caused by one of these issues.
RUb is not intended for use with ANY other mod except for SH3 Commander. If you use any other mods with it, it voids both the warranty and the money back guarantee.