Visually identifying a rose species?

http://pg.photos.yahoo.com/ph/royalfrazier/detail?.dir 55&.dnmc0c.jpg&.src=ph The next three photos are of the rose bush.
So is there a way to figure out what kind of rose you have? Any good web resources to help ID one? It is more curiosity than anything.
There is a 40+ year old rose bush on the property. It is huge...7-8 feet high, 10 wide, 4 feet deep with runners along one wall going another 10 feet. INisde the bush are some primary canes/trunks that are 1" round and look more like a tree trunk than a rose bush.
There are a few pictures there showing size and some details of the leaves/flowers. ALthough yahoo downsizes them to a lower quality.
They having mostly five leaves but some are three leaved stems. The leaves are glossy/waxy (not a treatment). Tiny serrated edges on the leaves. Pale pink flowers, with multiple buds in a cluster on short stems from the cane. many layered petals with yellow ?stamen? inside. Buds appear to have five green sides, that peel back to expose flower. Heavily thorned, with thorns being reddish, sometimes orange(probably an age thing). The woody trunks are chocolate colored, glossy with white parallel crackling, and the thorns are white.
DiGiTAL ViNYL (no email) Zone 6b/7, Westchester Co, NY, <1 mile off L.I.Sound 3rd year gardener http://pg.photos.yahoo.com/ph/royalfrazier/album?.dir=/2055&.src=ph
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http://pg.photos.yahoo.com/ph/royalfrazier/detail?.dir 55&.dnmc0c.jpg&.src=ph

Looks like a nice specimen of New Dawn.
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THat is so cool. That was my guess. I kept searching photos from all different sites and New Dawn stood out. Flower looks right and leaves match. NEw Dawn is from the 1930's and this bush could actually be from that time period. The property has existed since it was a horse barn.
Thanks for that.

DiGiTAL ViNYL (no email) Zone 6b/7, Westchester Co, NY, <1 mile off L.I.Sound 3rd year gardener http://pg.photos.yahoo.com/ph/royalfrazier/album?.dir=/2055&.src=ph
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