[IoanaD]

I know that transesterification of isopentenyl acetate to isoamyl acetate can be done with an acid and another alcohol that replaces the first R group. However, i am asked what other way we can perform the same transformation. Is there a way of reducing that double bond without touching the carbonyl? I was even thinking of protecting it via a bifunctional alcohol and then adding H2/Pd in order to selectively reduce the double bond.
Is there any other way of achieving this?

[Enantiomer]

you're right on the money, you can protect the ketone via acetal formation and then add a selective catalst (I think LiAlH₄, I think H₂ Pd would accomplish this, as would LiAlH₄ (I'm not 100% about this one, and since it is very difficult to handle in the lab H₂ Pd would be the better choice either way)
http://en.wikipedia.org/wiki/Protecting_group

[Arctic-Nation]

No. This is an ester we're talking about, not a ketone, so protecting groups are out. The easiest way to reduce double bonds is some noble metal/hydrogen combination. Most of those won't touch the ester functionality, unlike hydride reagents.

[movies]

Also, LiAlH₄ will not reduce isolate C–C double bonds (it would reduce the ester, however).  H₂ + Pd/C is the way to go for this one.