Can I change to a different RSP plugin?
The RSP plugin selection was removed from Project64 in v1.2, because the features of both previous plugins (HLE.dll and MLE.dll) were combined into one (just called RSP.dll). You can use other RSP plugins by renaming them “RSP.dll” and putting them in the plugins folder (there are a few known 3rd party builds of the Project64 RSP generally with some small changes from the v1.4 source – there is no reason for most users to change the RSP).