No need for code injection to do skills by memory writing.
Here's a hint on how to do it.
Open CE... set 4 bytes (check pause game while scanning if your PC is slow)
1. Stand in one spot then search for "Greater than <base address>"
2. Execute a long casting skill like Teleport Portal
3. While it's still executing, search for Changed value
4. Unpaused (if it's paused), cancel skill, and search for Changed Value again
5. Run around a bit, then stand in another spot, then search for "Unchanged Value"
6. Repeat 2-5 a few times, and you'll get the memory addresses.
7. Once you get the address, do a complete trace back to get all the "offsets" until you hit the base address.
Once you get the list of offsets, post here, and I'll tell you what to do further.