The torture-the-loser school of moviemaking lately perfected by Todd Solondz has a promising new disciple. Mike White's script and his starring performance as Buck in Chuck & Buck inspire the same kind of squirming and wincing as Happiness, albeit on a much smaller scale. Buck is a grating zero whose crush on childhood buddy and sex-playmate Chuck (played by Chris Weitz) leads him to move to L.A. and stalk Chuck, who's now a successful music exec with a fiancee. Buck is mighty icky, so Chuck's forbearance when Buck refuses to leave him alone is somewhat puzzling, but becomes a little more plausible by film's end. The best thing about Chuck & Buck is certainly Buck's casting and production of his autobiographical playlet "Frank & Hank," starring a terrible amateur actor named Sam in the Chuck-inspired role of Frank. Lupe Ontiveros is super as Beverly, who Buck hires to produce and direct the play. Sam, played with endearing doltishness by Paul Weitz (Chris Weitz's brother) lets Buck hang around with him, and the two have some funny scenes together. Not great but always watchable, Chuck & Buck is a wry, inventive small movie.