How to integrate two projects into one?

Maybe it could be clearer..

Say I have a design.bdf with 4 input pins and two output pins. Then I want to create a vhdl file with the needed library.

In my_design.bdf I use some altera's components (eg lpm_mult, lpm_compare, etc etc) so my_design.bdf needs lpm_mult.qip, lpm_coompare.qip and so on. After that I create a hdl version of my_design.bdf and then have some simulations with modelsim.

Now I would be able to import my_design.vhdl in another quartus project. I think that I have to import my_design.vhdl but also the needed *.qip.

There is a synthetic way to accomplish this?