Software that will take a released recording and delete certain instruments does not exist to my knowledge. One can buy recordings of popular songs that consist of just bass guitar and drums on two separate tracks. Since the two instruments are on separate tracks, one can delete either one and add their own.
You might consider using DAW software, like GarageBand or Audacity in to which you'd import the bass guitar track then add your guitar playing and your brother in-law's drumming plus additional guitar tracks. You could even collaborate with other musicians on the internet who would add vocals, keyboard or any other instrument tracks.
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