[j-nsp] RSVP to LDP

[Plz]

Hi,
Dose anyone here have experience in changing rsvp to ldp?
I've got a problem here.
It's about a mpls-based network, about 50 P routers(M20 & M320)  and 20 PE
routers(M10i).
The label distributing protocol is now the RSVP. LSP are created mannually.
TE is not enabled.
We want to change rsvp to ldp coz the scalability problem of rsvp and the
inter-operational
problem with Huawei devices.

Here is my plan.
1. Enable LDP on every P & PE routers.
2. Change the LDP route preference to 6 on every P & PE routers .
    (LDP's default route preference is 9, RSVP is 7)
3. Delete the RSVP and the manual label-switch-path config in mpls.

My question is:
1.Will it work?
2.Is there any problem when the LDP & RSVP are running simultaneously?

Any sugguestion ll be appreciated. Thanks

Regards,
runt