We are actively developing rbims, so for now it is not available at CRAN or Biocondiuctor, however you can access to the development version from GitHub like this:
Install devtools in the case you dont have it.
install.packages("devtools")
If you are in a MAC system, you would need to download XQuartz, you can read more about it here.
Install rbims.
library(devtools)
install_github("mirnavazquez/RbiMs")
library(rbims)