Dear Professor Indicated by RMP as Easy,
I [have some long and boring story about an ambiguous "hold" that "they" finally removed] so now I can register, but all of the classes are filled, so can you add me to your class? It is the only class I need to graduate. I know this is an unusual request, but [I looked at RMP and all of the reliable data therein led me to believe the other professors would be mean to me if I asked them instead so I asked you].
Lenny the Liar
According to the degree audit I just ran without your permission, you also need field work and a practicum in your major, an English elective, and, strangely, Freshman Seminar. That is assuming you don't fail the remedial math you're taking over intersession. The math class is interesting, by the way, because how did "they" let you register for that when "they" put a "hold" on your account? Weird, right? Oh, and now that I've made you read a long boring story too, I'll answer your question: No. You can't be added to a lab - it's literally against the law.
PS It's not that unusual of a request - you are much more ordinary than you think.
PPS I can also see the same exact class schedule that you can see, so go register for Professor RMP Says is Mean before it's too late.
PPPS Professor RMP Says is Mean really is mean - ha ha.